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Detail of General William Baillie from the painting Schuttersmsaltijd (Shooters meal time) by van der Helst circa 1637-38. Now on display in the Rijksmuseum, Amsterdam.

General William Baillie, was a Scottish professional soldier who commanded a regiment under Gustavus Adolphus in Sweden before returning to Scotland in 1639.

In 1644, Baillie marched into England with the Army of the Covenant. He commanded the Scottish infantry at the Battle of Marston Moor. In 1645, he commanded the detachment sent from Alexander Leslie, 1st Earl of Leven's army against James Graham, 1st Marquess of Montrose. On his arrival in Scotland, Baillie successfully manoeuvred to prevent Montrose from marching south. In April, he almost caught up with Montrose at Dundee but Montrose succeeded in escaping into the Highlands. Baillie then split his forces, planning to trap Montrose between his own troops and a detachment commanded by Sir John Hurry. However, Montrose decisively defeated Hurry at the Battle of Auldearn in May 1645; two months later he defeated Baillie himself at the Battle of Alford. After this defeat, Baillie tendered his resignation. This was rejected by the Covenanter leaders. Instead a new army was raised. Baillie retained command but was now accompanied by a Committee of War headed by the Earl of Argyll. Against Baillie's advice, a battle with Montrose was forced at the Battle of Kilsyth. Once again, he was defeated - his final involvement against Montrose who was in turn defeated at the Battle of Philiphaugh on 13 September.

During the Second Civil War, Baillie commanded the infantry in the Duke of Hamilton's ill-fated Engager invasion of England. The Engagers were defeated by Oliver Cromwell at the Battle of Preston in August 1648. While Hamilton escaped, Baillie was ordered to surrender with his infantry.


  •  Stephen, Leslie, ed (1885). "Baillie, William (fl.1648)". Dictionary of National Biography. 2. London: Smith, Elder & Co. 
  • Baillie, Robert: The letters and journals of Robert Baillie, 1637-1662 (Bannatyne Club) Publisher: [Bannatyne Club] (1 January 1841) ASIN: B00086PL1E
  • Letters and Journals (3 vol. set) Publisher: Ams Pr Inc (March 2005) ISBN 0-404-52800-7

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